A Little Confusion about Constructor and Main Method Execution

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C#

VB

if we have a "constructor" and the "main()" method whichone will called first on the execution of the form/page?

Posted 19-Feb-13 23:48pm

AddyRuno

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Fred Flams 20-Feb-13 5:54am

Well, there is no correct answer to that question I guess.
I you "Main" method is static and declared as your application entry point then it will be called first, otherwise only the constructor will be called

boogac 20-Feb-13 6:03am

constructor can be static also..there will be answers sure but i think best way debug and see

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V. · Answer 1 · 2013-02-20T00:03:00

Main is a static entry point method for your application. When the application starts, Main is called first. After that it is not called anymore in normal circumstances. Note that Main, does not "construct" anything.! If you look at a normal C# winform application it will say something like this:

C#

static class Program {
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() {
		  Application.EnableVisualStyles();
		  Application.SetCompatibleTextRenderingDefault(false);

                  //new Form1 CONSTRUCTS the form.
		  Application.Run(new Form1());
		}
	}

The Constructor is called when you generate an object from a class with the new keyword.
It is the method that "constructs" the "object" from a template = the "class". This is done by instantiating the variables, event, methods, ...

Hope this helps.

OriginalGriff · Answer 2 · 2013-02-20T00:09:00

No, it doesn't work like that! :laugh:

There is (or should be) only one Main method per project / application, and it will be called once and only once when your application starts, before any objects are constructed. If will then construct the objects needed to run you application and that includes the form in a WinForms app. Normally, you don't need to even look at it, much less change it! :D

Every time you create an instance of a class, the class constructor will be called immediately - as it is the code which actually builds the object instance and sets it starting values.

A Little Confusion about Constructor and Main Method Execution

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